Novel human ion channel protein and polynucleotides encoding the same

ABSTRACT

Novel human polynucleotide and polypeptide sequences are disclosed that can be used in therapeutic, diagnostic, and pharmacogenomic applications.

[0001] The present application claims the benefit of U.S. Provisional Application No. 60/194,255 which was filed on Apr. 3, 2000 and is herein incorporated by reference in its entirety.

1. INTRODUCTION

[0002] The present invention relates to the discovery, identification, and characterization of novel human polynucleotides encoding a protein that shares sequence similarity with mammalian ion channel proteins. The invention encompasses the described polynucleotides, host cell expression systems, the encoded proteins, fusion proteins, polypeptides and peptides, antibodies to the encoded proteins and peptides, and genetically engineered animals that either lack or over express the disclosed polynucleotides, antagonists and agonists of the proteins, and other compounds that modulate the expression or activity of the proteins encoded by the disclosed polynucleotides that can be used for diagnosis, drug screening, clinical trial monitoring, or the treatment of diseases and disorders.

2. BACKGROUND OF THE INVENTION

[0003] Ion channel proteins are integral membrane proteins that mediate or facilitate the passage of materials across the lipid bilayer. Given that ion transport has been identified as an important regulator of mammalian physiology, ion channel proteins are proven drug targets.

3. SUMMARY OF THE INVENTION

[0004] The present invention relates to the discovery, identification, and characterization of nucleotides that encode a novel human protein, and the corresponding amino acid sequence of this protein. The novel human protein (NHP) described for the first time herein shares structural similarity with mammalian ion channel proteins, and particularly voltage-gated potassium channel proteins.

[0005] The novel human nucleic acid sequences described herein, encode a protein/open reading frame (ORF) of 923 amino acids in length (SEQ ID NO: 2).

[0006] The invention also encompasses agonists and antagonists of the described NHPs, including small molecules, large molecules, mutant NHPs, or portions thereof, that compete with native NHP, peptides, and antibodies, as well as nucleotide sequences that can be used to inhibit the expression of the described NHPs (e.g., antisense and ribozyme molecules, and gene or regulatory sequence replacement constructs) or to enhance the expression of the described NHP polynucleotides (e.g., expression constructs that place the described polynucleotide under the control of a strong promoter system), and transgenic animals that express a NHP transgene, or “knock-outs” (which can be conditional) that do not express a functional NHP. Knock-out mice can be produced in several ways, one of which involves the use of mouse embryonic stem cells (“ES cells”) lines that contain gene trap mutations in a murine homolog of at least one of the described NHPs. When the unique NHP sequences described in SEQ ID NOS:1-3 are “knocked-out” they provide a method of identifying phenotypic expression of the particular gene as well as a method of assigning function to previously unknown genes. Additionally, the unique NHP sequences described in SEQ ID NOS:1-3 are useful for the identification of coding sequence and the mapping a unique gene to a particular chromosome.

4. DESCRIPTION OF THE SEQUENCE LISTING AND FIGURES

[0007] The Sequence Listing provides the sequence of the described NHP ORF that encodes the described NHP amino acid sequence. SEQ ID NO:3 describes a NHP ORF as well as flanking 5′ and 3′ sequences.

5. DETAILED DESCRIPTION OF THE INVENTION

[0008] The NHP, described for the first time herein, is a novel protein that is expressed in, inter alia, human cell lines, human fetal brain, brain, thymus, lymph node, bone marrow, trachea, fetal liver, prostate, testis, thyroid, salivary gland, skeletal muscle, heart, uterus, mammary gland, and gene trapped human cells.

[0009] The present invention encompasses the nucleotides presented in the Sequence Listing,: host cells expressing such nucleotides, the expression products of such nucleotides, and: (a) nucleotides that encode mammalian homologs of the described polynucleotides, including the specifically described NHP, and the NHP products; (b) nucleotides that encode one or more portions of the NHP that correspond to functional domains, and the polypeptide products specified by such nucleotide sequences, including but not limited to the novel regions of any active domain(s); (c) isolated nucleotides that encode mutant versions, engineered or naturally occurring, of the described NHP in which all or a part of at least one domain is deleted or altered, and the polypeptide products specified by such nucleotide sequences, including but not limited to soluble proteins and peptides in which all or a portion of the signal sequence in deleted; (d) nucleotides that encode chimeric fusion proteins containing all or a portion of a coding region of NHP, or one of its domains (e.g., a receptor or ligand binding domain, accessory protein/self-association domain, etc.) fused to another peptide or polypeptide; or (e) therapeutic or diagnostic derivatives of the described polynucleotides such as oligonucleotides, antisense polynucleotides, ribozymes, dsRNA, or gene therapy constructs comprising a sequence first disclosed in the Sequence Listing.

[0010] As discussed above, the present invention includes: (a) the human DNA sequences presented in the Sequence Listing (and vectors comprising the same) and additionally contemplates any nucleotide sequence encoding a contiguous NHP open reading frame (ORF) that hybridizes to a complement of a DNA sequence presented in the Sequence Listing under highly stringent conditions, e.g., hybridization to filter-bound DNA in 0.5 M NaHPO₄, 7% sodium dodecyl sulfate (SDS), 1 mM EDTA at 65° C., and washing in 0.1×SSC/0.1% SDS at 68° C. (Ausubel F. M. et al., eds., 1989, Current Protocols in Molecular Biology, Vol. I, Green Publishing Associates, Inc., and John Wiley & sons, Inc., New York, at p. 2.10.3) and encodes a functionally equivalent gene product. Additionally contemplated are any nucleotide sequences that hybridize to the complement of a DNA sequence that encodes and expresses an amino acid sequence presented in the Sequence Listing under moderately stringent conditions, e.g., washing in 0.2×SSC/0.1% SDS at 42° C. (Ausubel et al., 1989, supra), yet still encodes a functionally equivalent NHP product. Functional equivalents of a NHP include naturally occurring NHPs present in other species and mutant NHPs whether naturally occurring or engineered (by site directed mutagenesis, gene shuffling, directed evolution as described in, for example, U.S. Pat. No. 5,837,458). The invention also includes degenerate nucleic acid variants of the disclosed NHP polynucleotide sequences.

[0011] Additionally contemplated are polynucleotides encoding a NHP ORF, or its functional equivalent, encoded by polynucleotide sequences that are about 99, 95, 90, or about 85 percent similar or identical to corresponding regions of the nucleotide sequences of the Sequence Listing (as measured by BLAST sequence comparison analysis using, for example, the GCG sequence analysis package using standard default settings).

[0012] The invention also includes nucleic acid molecules, preferably DNA molecules, that hybridize to, and are therefore the complements of, the described NHP gene (or coding region) nucleotide sequences. Such hybridization conditions may be highly stringent or less highly stringent, as described above. In instances where the nucleic acid molecules are deoxyoligonucleotides (“DNA oligos”), such molecules are generally about 16 to about 100 bases long, or about 20 to about 80, or about 34 to about 45 bases long, or any variation or combination of sizes represented therein that incorporate a contiguous region of sequence first disclosed in the Sequence Listing. Such oligonucleotides can be used in conjunction with the polymerase chain reaction (PCR) to screen libraries, isolate clones, and prepare cloning and sequencing templates, etc.

[0013] Alternatively, such NHP oligonucleotides can be used as hybridization probes for screening libraries, and assessing gene expression patterns (particularly using a micro array or high-throughput “chip” format). Additionally, a series of the described NHP oligonucleotide sequences, or the complements thereof, can be used to represent all or a portion of the described NHP sequences. An oligonucleotide or polynucleotide sequence first disclosed in at least a portion of one or more of the sequences of SEQ ID NOS: 1-3 can be used as a hybridization probe in conjunction with a solid support matrix/substrate (resins, beads, membranes, plastics, polymers, metal or metallized substrates, crystalline or. polycrystalline substrates, etc.). Of particular note are spatially addressable arrays (i.e., gene chips, microtiter plates, etc.) of oligonucleotides and polynucleotides, or corresponding oligopeptides and polypeptides, wherein at least one of the biopolymers present on the spatially addressable array comprises an oligonucleotide or polynucleotide sequence first disclosed in at least one of the sequences of SEQ ID NOS: 1-3, or an amino acid sequence encoded thereby. Methods for attaching biopolymers to, or synthesizing biopolymers on, solid support matrices, and conducting binding studies thereon are disclosed in, inter alia, U.S. Pat. Nos. 5,700,637, 5,556,752, 5,744,305, 4,631,211, 5,445,934, 5,252,743, 4,713,326, 5,424,186, and 4,689,405 the disclosures of which are herein incorporated by reference in their entirety.

[0014] Addressable arrays comprising sequences first disclosed in SEQ ID NOS:1-3 can be used to identify and characterize the temporal and tissue specific expression of a gene. These addressable arrays incorporate oligonucleotide sequences of sufficient length to confer the required specificity, yet be within the limitations of the production technology. The length of these probes is within a range of between about 8 to about 2000 nucleotides. Preferably the probes consist of 60 nucleotides and more preferably 25 nucleotides from the sequences first disclosed in SEQ ID NOS:1-3.

[0015] For example, a series of the described oligonucleotide sequences, or the complements thereof, can be used in chip format to represent all or a portion of the described sequences. The oligonucleotides, typically between about 16 to about 40 (or any whole number within the stated range) nucleotides in length can partially overlap each other and/or the sequence may be represented using oligonucleotides that do not overlap. Accordingly, the described polynucleotide sequences shall typically comprise at least about two or three distinct oligonucleotide sequences of at least about 8 nucleotides in length that are each first disclosed in the described Sequence Listing. Such oligonucleotide sequences can begin at any nucleotide present within a sequence in the Sequence Listing and proceed in either a sense (5′-to-3′) orientation vis-a-vis the described sequence or in an antisense orientation.

[0016] Microarray-based analysis allows the discovery of broad patterns of genetic activity, providing new understanding of gene functions and generating novel and unexpected insight into transcriptional processes and biological mechanisms. The use of addressable arrays comprising sequences first disclosed in SEQ ID NOS:1-3 provides detailed information about transcriptional changes involved in a specific pathway, potentially leading to the identification of novel components or gene functions that manifest themselves as novel phenotypes.

[0017] Probes consisting of sequences first disclosed in SEQ ID NOS:1-3 can also be used in the identification, selection and validation of novel molecular targets for drug discovery. The use of these unique sequences permits the direct confirmation of drug targets and recognition of drug dependent changes in gene expression that are modulated through pathways distinct from the drugs intended target. These unique sequences therefore also have utility in defining and monitoring both drug action and toxicity.

[0018] As an example of utility, the sequences first disclosed in SEQ ID NOS:1-3 can be utilized in microarrays or other assay formats, to screen collections of genetic material from patients who have a particular medical condition. These investigations can also be carried out using the sequences first disclosed in SEQ ID NOS:1-3 in silico and by comparing previously collected genetic databases and the disclosed sequences using computer software known to those in the art.

[0019] Thus the sequences first disclosed in SEQ ID NOS:1-3 can be used to identify mutations associated with a particular disease and also as a diagnostic or prognostic assay.

[0020] Although the presently described sequences have been specifically described using nucleotide sequence, it should be appreciated that each of the sequences can uniquely be described using any of a wide variety of additional structural attributes, or combinations thereof. For example, a given sequence can be described by the net composition of the nucleotides present within a given region of the sequence in conjunction with the presence of one or more specific oligonucleotide sequence(s) first disclosed in the SEQ ID NOS: 1-3. Alternatively, a restriction map specifying the relative positions of restriction endonuclease digestion sites, or various palindromic or other specific oligonucleotide sequences can be used to structurally describe a given sequence. Such restriction maps, which are typically generated by widely available computer programs (e.g., the University of Wisconsin GCG sequence analysis package, SEQUENCHER 3.0, Gene Codes Corp., Ann Arbor, Mich., etc.), can optionally be used in conjunction with one or more discrete nucleotide sequence(s) present in the sequence that can be described by the relative position of the sequence relatve to one or more additional sequence(s) or one or more restriction sites present in the disclosed sequence.

[0021] For oligonucleotide probes, highly stringent conditions may refer, e.g., to washing in 6×SSC/0.05% sodium pyrophosphate at 37° C. (for 14-base oligos), 48° C. (for 17-base oligos), 55° C. (for 20-base oligos), and 60° C. (for 23-base oligos). These nucleic acid molecules may encode or act as NHP gene antisense molecules, useful, for example, in NHP gene regulation (for and/or as antisense primers in amplification reactions of NHP gene nucleic acid sequences). With respect to NHP gene regulation, such techniques can be used to regulate biological functions. Further, such sequences may be used as part of ribozyme and/or triple helix sequences that are also useful for NHP gene regulation.

[0022] Inhibitory antisense or double stranded oligonucleotides can additionally comprise at least one modified base moiety which is selected from the group including but not limited to 5-fluorouracil, 5-bromouracil, 5-chlorouracil, 5-iodouracil, hypoxanthine, xantine, 4-acetylcytosine, 5-(carboxyhydroxylmethyl) uracil, 5-carboxymethylaminomethyl-2-thiouridine, 5-carboxymethylaminomethyluracil, dihydrouracil, beta-D-galactosylqueosine, inosine, N6-isopentenyladenine, 1-methylguanine, 1-methylinosine, 2,2-dimethylguanine, 2-methyladenine, 2-methylguanine, 3-methylcytosine, 5-methylcytosine, N6-adenine, 7-methylguanine, 5-methylaminomethyluracil, 5-methoxyaminomethyl-2-thiouracil, beta-D-mannosylqueosine, 5′-methoxycarboxymethyluracil, 5-methoxyuracil, 2-methylthio-N6-isopentenyladenine, uracil-5-oxyacetic acid (v), wybutoxosine, pseudouracil, queosine, 2-thiocytosine, 5-methyl-2-thiouracil, 2-thiouracil, 4-thiouracil, 5-methyluracil, uracil-5-oxyacetic acid methylester, uracil-5-oxyacetic acid (v), 5-methyl-2-thiouracil, 3-(3-amino-3-N-2-carboxypropyl) uracil, (acp3)w, and 2,6-diaminopurine.

[0023] The antisense oligonucleotide can also comprise at least one modified sugar moiety selected from the group including but not limited to arabinose, 2-fluoroarabinose, xylulose, and hexose.

[0024] In yet another embodiment, the antisense oligonucleotide will comprise at least one modified phosphate backbone selected from the group consisting of a phosphorothioate, a phosphorodithioate, a phosphoramidothioate, a phosphoramidate, a phosphordiamidate, a methylphosphonate, an alkyl phosphotriester, and a formacetal or analog thereof.

[0025] In yet another embodiment, the antisense oligonucleotide is an α-anomeric oligonucleotide. An α-anomeric oligonucleotide forms specific double-stranded hybrids with complementary RNA in which, contrary to the usual β-units, the strands run parallel to each other (Gautier et al., 1987, Nucl. Acids Res. 15:6625-6641). The oligonucleotide is a 2′-0-methylribonucleotide (Inoue et al., 1987, Nucl. Acids Res. 15:6131-6148), or a chimeric RNA-DNA analogue (Inoue et al., 1987, FEBS Lett. 215:327-330). Alternatively, double stranded RNA can be used to disrupt the expression and function of a targeted NHP. Oligonucleotides of the invention can be synthesized by standard methods known in the art, e.g. by use of an automated DNA synthesizer (such as are commercially available from Biosearch, Applied Biosystems, etc.). As examples, phosphorothioate oligonucleotides can be synthesized by the method of Stein et al. (1988, Nucl. Acids Res. 16:3209), and methylphosphonate oligonucleotides can be prepared by use of controlled pore glass polymer supports (Sarin et al., 1988, Proc. Natl. Acad. Sci. U.S.A. 85:7448-7451), etc.

[0026] Low stringency conditions are well known to those of skill in the art, and will vary predictably depending on the specific organisms from which the library and the labeled sequences are derived. For guidance regarding such conditions see, for example, Sambrook et al., 1989, Molecular Cloning, A Laboratory Manual (and periodic updates thereof), Cold Springs Harbor Press, N.Y.; and Ausubel et al., 1989, Current Protocols in Molecular Biology, Green Publishing Associates and Wiley Interscience, N.Y.

[0027] Alternatively, suitably labeled NHP nucleotide probes can be used to screen a human genomic library using appropriately stringent conditions or by PCR. The identification and characterization of human genomic clones is helpful for identifying polymorphisms (including, but not limited to, nucleotide repeats, microsatellite alleles, single nucleotide polymorphisms, or coding single nucleotide polymorphisms), determining the genomic structure of a given locus/allele, and designing diagnostic tests. For example, sequences derived from regions adjacent to the intron/exon boundaries of the human gene can be used to design primers for use in amplification assays to detect mutations within the exons, introns, splice sites (e.g., splice acceptor and/or donor sites), etc., that can be used in diagnostics and pharmacogenomics.

[0028] Further, a NHP gene homolog can be isolated from nucleic acid from an organism of interest by performing PCR using two degenerate or “wobble” oligonucleotide primer pools designed on the basis of amino acid sequences within the NHP products disclosed herein. The template for the reaction may be total RNA, mRNA, and/or cDNA obtained by reverse transcription of mRNA prepared from human or non-human cell lines or tissue known or suspected to express an allele of a NHP gene. The PCR product can be subcloned and sequenced to ensure that the amplified sequences represent the sequence of the desired NHP gene. The PCR fragment can then be used to isolate a full length cDNA clone by a variety of methods. For example, the amplified fragment can be labeled and used to screen a cDNA library, such as a bacteriophage cDNA library. Alternatively, the labeled fragment can be used to isolate genomic clones via the screening of a genomic library.

[0029] PCR technology can also be used to isolate full length cDNA sequences. For example, RNA can be isolated, following standard procedures, from an appropriate cellular or tissue source (i.e., one known, or suspected, to express a NHP polynucleotide). A reverse transcription (RT) reaction can be performed on the RNA using an oligonucleotide primer specific for the most 5′ end of the amplified fragment for the priming of first strand synthesis. The resulting RNA/DNA hybrid may then be “tailed” using a standard terminal transferase reaction, the hybrid may be digested with RNase H, and second strand synthesis may then be primed with a complementary primer. Thus, cDNA sequences upstream of the amplified fragment can be isolated. For a review of cloning strategies that can be used, see e.g., Sambrook et al., 1989, supra.

[0030] A cDNA encoding a mutant NHP gene can be isolated, for example, by using PCR. In this case, the first cDNA strand may be synthesized by hybridizing an oligo-dT oligonucleotide to mRNA isolated from tissue known or suspected to be expressed in an individual putatively carrying a mutant NHP allele, and by extending the new strand with reverse transcriptase. The second strand of the cDNA is then synthesized using an oligonucleotide that hybridizes specifically to the 5′ end of the normal gene. Using these two primers, the product is then amplified via PCR, optionally cloned into a suitable vector, and subjected to DNA sequence analysis through methods well known to those of skill in the art. By comparing the DNA sequence of the mutant NHP allele to that of a corresponding normal NHP allele, the mutation(s) responsible for the loss or alteration of function of the mutant NHP gene product can be ascertained.

[0031] Alternatively, a genomic library can be constructed using DNA obtained from an individual suspected of or known to carry a mutant NHP allele (e.g., a person manifesting a NHP-associated phenotype such as, for example, obesity, high blood pressure, connective tissue disorders, infertility, diabetes, alopecia, arrhythmia, etc.), or a cDNA library can be constructed using RNA from a tissue known, or suspected, to express a mutant NHP allele. A normal NHP gene, or any suitable fragment thereof, can then be labeled and used as a probe to identify the corresponding mutant NHP allele in such libraries. Clones containing mutant NHP gene sequences can then be purified and subjected to sequence analysis according to methods well known to those skilled in the art.

[0032] Additionally, an expression library can be constructed utilizing cDNA synthesized from, for example, RNA isolated from a tissue known, or suspected, to express a mutant NHP allele in an individual suspected of or known to carry such a mutant allele. In this manner, gene products made by the putatively mutant tissue can be expressed and screened using standard antibody screening techniques in conjunction with antibodies raised against a normal NHP product, as described below. (For screening techniques, see, for example, Harlow, E. and Lane, eds., 1988, “Antibodies: A Laboratory Manual”, Cold Spring Harbor Press, Cold Spring Harbor.) Additionally, screening can be accomplished by screening with labeled NHP fusion proteins, such as, for example, alkaline phosphatase-NHP or NHP-alkaline phosphatase fusion proteins. In cases where a NHP mutation results in an expressed gene product with altered function (e.g., as a result of a missense or a frameshift mutation), polyclonal antibodies to a NHP are likely to cross-react with a corresponding mutant NHP gene product. Library clones detected via their reaction with such labeled antibodies can be purified and subjected to sequence analysis according to methods well known in the art.

[0033] The invention also encompasses (a) DNA vectors that contain any of the foregoing NHP coding sequences and/or their complements (i.e., antisense); (b) DNA expression vectors that contain any of the foregoing NHP coding sequences operatively associated with a regulatory element that directs the expression of the coding sequences (for example, baculo virus as described in U.S. Pat. No. 5,869,336 herein incorporated by reference); (c) genetically engineered host cells that contain any of the foregoing NHP coding sequences operatively associated with a regulatory element that directs the expression of the coding sequences in the host cell; and (d) genetically engineered host cells that express an endogenous NHP gene under the control of an exogenously introduced regulatory element (i.e., gene activation). As used herein, regulatory elements include, but are not limited to, inducible and non-inducible promoters, enhancers, operators and other elements known to those skilled in the art that drive and regulate expression. Such regulatory elements include but are not limited to the cytomegalovirus (hCMV) immediate early gene, regulatable, viral elements (particularly retroviral LTR promoters), the early or late promoters of SV40 adenovirus, the lac system, the trp system, the TAC system, the TRC system, the major operator and promoter regions of phage lambda, the control regions of fd coat protein, the promoter for 3-phosphoglycerate kinase (PGK), the promoters of acid phosphatase, and the promoters of the yeast α-mating factors.

[0034] The present invention also encompasses antibodies and anti-idiotypic antibodies (including Fab fragments), antagonists and agonists of the NHP, as well as compounds or nucleotide constructs that inhibit expression of a NHP gene (transcription factor inhibitors, antisense and ribozyme molecules, or gene or regulatory sequence replacement constructs), or promote the expression of a NHP (e.g., expression constructs in which NHP coding sequences are operatively associated with expression control elements such as promoters, promoter/enhancers, etc.).

[0035] The NHP or NHP peptides, NHP fusion proteins, NHP nucleotide sequences, antibodies, antagonists and agonists can be useful for the detection of mutant NHPs or inappropriately expressed NHPs for the diagnosis of disease. The NHP proteins or peptides, NHP fusion proteins, NHP nucleotide sequences, host cell expression systems, antibodies, antagonists, agonists and genetically engineered cells and animals can be used for screening for drugs (or high throughput screening of combinatorial libraries) effective in the treatment of the symptomatic or phenotypic manifestations of perturbing the normal function of NHP in the body. The use of engineered host cells and/or animals may offer an advantage in that such systems allow not only for the identification of compounds that bind to the endogenous receptor for an NHP, but can also identify compounds that trigger NHP-mediated activities or pathways.

[0036] Finally, the NHP products can be used as therapeutics. For example, soluble derivatives such as NHP peptides/domains corresponding to a NHP, NHP fusion protein products (especially NHP-Ig fusion proteins, i.e., fusions of a NHP, or a domain of a NHP, to an IgFc), NHP antibodies and anti-idiotypic antibodies (including Fab fragments), antagonists or agonists (including compounds that modulate or act on downstream targets in a NHP-mediated pathway) can be used to directly treat diseases or disorders. For instance, the administration of an effective amount of soluble NHP, or a NHP-IgFc fusion protein or an anti-idiotypic antibody (or its Fab) that mimics the NHP could activate or effectively antagonize the endogenous NHP receptor. Nucleotide constructs encoding such NHP products can be used to genetically engineer host cells to express such products in vivo; these genetically engineered cells function as “bioreactors” in the body delivering a continuous supply of a NHP, a NHP peptide, or a NHP fusion protein to the body. Nucleotide constructs encoding functional NHPs, mutant NHPs, as well as antisense and ribozyme molecules can also be used in “gene therapy” approaches for the modulation of NHP expression. Thus, the invention also encompasses pharmaceutical formulations and methods for treating biological disorders.

[0037] Various aspects of the invention are described in greater detail in the subsections below.

5.1 The NHP Sequences

[0038] The cDNA sequence and the corresponding deduced amino acid sequence of the described NHP are presented in the Sequence Listing. The NHP nucleotides were obtained from clustered human gene trapped sequences, ESTs, and cDNA clones from human fetal brain, skeletal muscle, bone marrow, and thymus RT reactions and phage and plasmid cDNA libraries (Clontech, Palo Alto, Calif., Edge Biosystems, Gaithersburg, Md.). Two silent polymorphisms were also identified including a G-or-C transversion in the sequence region corresponding to, for example, nucleotide number 123 of SEQ ID NO:1, and a C-or-T transition in the sequence region corresponding to, for example, nucleotide number 204 of SEQ ID NO:1

[0039] An additional application of the described novel human polynucleotide sequences is their use in the molecular mutagenesis/evolution of proteins that are at least partially encoded by the described novel sequences using, for example, polynucleotide shuffling or related methodologies. Such approaches are described in U.S. Pat. Nos. 5,830,721 and 5,837,458 which are herein incorporated by reference in their entirety.

[0040] NHP gene products can also be expressed in transgenic animals. Animals of any species,.including, but not limited to, worms, mice, rats, rabbits, guinea pigs, pigs, micro-pigs, birds, goats, and non-human primates, e.g., baboons, monkeys, and chimpanzees may be used to generate NHP transgenic animals.

[0041] Any technique known in the art may be used to introduce a NHP transgene into animals to produce the founder lines of transgenic animals. Such techniques include, but are not limited to pronuclear microinjection (Hoppe, P. C. and Wagner, T. E., 1989, U.S. Pat. No. 4,873,191); retrovirus mediated gene transfer into germ lines (Van der Putten et al., 1985, Proc. Natl. Acad. Sci., USA 82:6148-6152); gene targeting in embryonic stem cells (Thompson et al., 1989, Cell 56:313-321); electroporation of embryos (Lo, 1983, Mol Cell. Biol. 3:1803-1814); and sperm-mediated gene transfer (Lavitrano et al., 1989, Cell 57:717-723); etc. For a review of such techniques, see Gordon, 1989, Transgenic Animals, Intl. Rev. Cytol. 115:171-229, which is incorporated by reference herein in its entirety.

[0042] The present invention provides for transgenic animals that carry the NHP transgene in all their cells, as well as animals which carry the transgene in some, but not all their cells, i.e., mosaic animals or somatic cell transgenic animals. The transgene may be integrated as a single transgene or in concatamers, e.g., head-to-head tandems or head-to-tail tandems. The transgene may also be selectively introduced into and activated in a particular cell type by following, for example, the teaching of Lasko et al., 1992, Proc. Natl. Acad. Sci. USA 89:6232-6236. The regulatory sequences required for such a cell-type specific activation will depend upon the particular cell type of interest, and will be apparent to those of skill in the art.

[0043] When it is desired that a NHP transgene be integrated into the chromosomal site of the endogenous NHP gene, gene targeting is preferred. Briefly, when such a technique is to be utilized, vectors containing some nucleotide sequences homologous to the endogenous NHP gene are designed for the purpose of integrating, via homologous recombination with chromosomal sequences, into and disrupting the function of the nucleotide sequence of the endogenous NHP gene (i.e., “knockout” animals).

[0044] The transgene can also be selectively introduced into a particular cell type, thus inactivating the endogenous NHP gene in only that cell type, by following, for example, the teaching of Gu et al., 1994, Science, 265:103-106. The regulatory sequences required for such a cell-type specific inactivation will depend upon the particular cell type of interest, and will be apparent to those of skill in the art.

[0045] Once transgenic animals have been generated, the expression of the recombinant NHP gene may be assayed utilizing standard techniques. Initial screening may be accomplished by Southern blot analysis or PCR techniques to analyze animal tissues to assay whether integration of the transgene has taken place. The level of mRNA expression of the transgene in the tissues of the transgenic animals may also be assessed using techniques which include but are not limited to Northern blot analysis of tissue samples obtained from the animal, in situ hybridization analysis, and RT-PCR. Samples of NHP gene-expressing tissue; may also be evaluated immunocytochemically using antibodies specific for the NHP transgene product.

5.2 The NHP and NHP Polypeptides

[0046] The described NHP, NHP polypeptides, peptide fragments, mutated, truncated, or deleted forms of the NHPs, and/or NHP fusion proteins can be prepared for a variety of uses. These uses include, but are not limited to, the generation of antibodies, as reagents in diagnostic assays, the identification of other cellular gene products related to NHP, as reagents in assays for screening for compounds that can be as pharmaceutical reagents useful in the therapeutic treatment of mental, biological, or medical disorders and diseases. Given the similarity information and expression data, the described NHP can be targeted (by drugs, oligos, antibodies, etc,) in order to treat disease, or to therapeutically augment the efficacy of, for example, chemotherapeutic agents.

[0047] The Sequence Listing discloses the amino acid sequence encoded by the described NHP ORF. The NHP displays an initiator methionine in a DNA sequence context consistent with a translation initiation site.

[0048] The NHP amino acid sequence of the invention includes the amino acid sequence presented in the Sequence Listing as well as analogues and derivatives thereof. Further, corresponding NHP homologues from other species are encompassed by the invention. In fact, any NHP proteins encoded by the NHP nucleotide sequences described above are within the scope of the invention, as are any novel polynucleotide sequences encoding all or any novel portion of an amino acid sequence presented in the Sequence Listing. The degenerate nature of the genetic code is well known, and, accordingly, each amino acid presented in the Sequence Listing, is generically representative of the well known nucleic acid “triplet” codon, or in many cases codons, that can encode the amino acid. As such, as contemplated herein, the amino acid sequences presented in the Sequence Listing, when taken together with the genetic code (see, for example, Table 4-1 at page 109 of “Molecular Cell Biology”, 1986, J. Darnell et al. eds., Scientific American Books, New York, N.Y., herein incorporated by reference) are generically representative of all the various permutations and combinations of nucleic acid sequences that can encode such amino acid sequences.

[0049] The invention also encompasses proteins that are functionally equivalent to the NHP encoded by the presently described nucleotide sequences as judged by any of a number of criteria, including, but not limited to, the ability to bind and cleave a substrate of a NHP, or the ability to effect an identical or complementary downstream pathway, or a change in cellular metabolism (e.g., proteolytic activity, ion flux, tyrosine phosphorylation, etc.). Such functionally equivalent NHP products include, but are not limited to, additions or substitutions of amino acid residues within the amino acid sequence encoded by the NHP nucleotide sequences described above, but which result in a silent change, thus producing a functionally equivalent gene product. Amino acid substitutions can be made on the basis of similarity in polarity, charge, solubility, hydrophobicity, hydrophilicity, and/or the amphipathic nature of the residues involved. For example, nonpolar (hydrophobic) amino acids include alanine, leucine, isoleucine, valine, proline, phenylalanine, tryptophan, and methionine; polar neutral amino acids include glycine, serine, threonine, cysteine, tyrosine, asparagine, and glutamine; positively charged (basic) amino acids include arginine, lysine, and histidine; and negatively charged (acidic) amino acids include aspartic acid and glutamic acid.

[0050] A variety of host-expression vector systems can be used to express the NHP nucleotide sequences of the invention. Where, as in the present instance, the NHP peptide or polypeptide is thought to be membrane protein, the hydrophobic regions of the protein can be excised and the resulting soluble peptide or polypeptide can be recovered from the culture media. Such expression systems also encompass engineered host cells that express a NHP, or functional equivalent, in situ. Purification or enrichment of a NHP from such expression systems can be accomplished using appropriate detergents and lipid micelles and methods well known to those skilled in the art. However, such engineered host cells themselves may be used in situations where it is important not only to retain the structural and functional characteristics of the NHP, but to assess biological activity, e.g., in drug screening assays.

[0051] The expression systems that may be used for purposes of the invention include but are not limited to microorganisms such as bacteria (e.g., E. coli, B. subtilis) transformed with recombinant bacteriophage DNA, plasmid DNA or cosmid DNA expression vectors containing NHP nucleotide sequences; yeast (e.g., Saccharomyces, Pichia) transformed with recombinant yeast expression vectors containing NHP nucleotide sequences; insect cell systems infected with recombinant virus expression vectors (e.g., baculovirus) containing NHP sequences; plant cell systems infected with recombinant virus expression vectors (e.g., cauliflower mosaic virus, CaMV; tobacco mosaic virus, TMV) or transformed with recombinant plasmid expression vectors (e.g., Ti plasmid) containing NHP nucleotide sequences; or mammalian cell systems (e.g., COS, CHO, BHK, 293, 3T3) harboring recombinant expression constructs containing promoters derived from the genome of mammalian cells (e.g., metallothionein promoter) or from mammalian viruses (e.g., the adenovirus late promoter; the vaccinia virus 7.5K promoter).

[0052] In bacterial systems, a number of expression vectors may be advantageously selected depending upon the use intended for the NHP product being expressed. For example, when a large quantity of such a protein is to be produced for the generation of pharmaceutical compositions of or containing NHP, or for raising antibodies to a NHP, vectors that direct the expression of high levels of fusion protein products that are readily purified may be desirable. Such vectors include, but are not limited, to the E. coli expression vector pUR278 (Ruther et al., 1983, EMBO J. 2:1791), in which a NHP coding sequence may be ligated individually into the vector in frame with the lacZ coding region so that a fusion protein is produced; pIN vectors (Inouye & Inouye, 1985, Nucleic Acids Res. 13:3101-3109; Van Heeke & Schuster, 1989, J. Biol. Chem. 264:5503-5509); and the like. pGEX vectors (Pharmacia or American Type Culture Collection) can also be used to express foreign polypeptides as fusion proteins with glutathione S-transferase (GST). In general, such fusion proteins are soluble and can easily be purified from lysed cells by adsorption to glutathione-agarose beads followed by elution in the presence of free glutathione. The PGEX vectors are designed to include thrombin or factor Xa protease cleavage sites so that the cloned target gene product can be released from the GST moiety.

[0053] In an insect system, Autographa californica nuclear polyhidrosis virus (AcNPV) is used as a vector to express foreign polynucleotides. The virus grows in Spodoptera frugiperda cells. A NHP coding sequence may be cloned individually into non-essential regions (for example the polyhedrin gene) of the virus and placed under control of an AcNPV promoter (for example the polyhedrin promoter). Successful insertion of NHP coding sequence will result in inactivation of the polyhedrin gene and production of non-occluded recombinant virus (i.e., virus lacking the proteinaceous coat coded for by the polyhedrin gene). These recombinant viruses are then used to infect Spodoptera frugiperda cells in which the inserted polynucleotide is expressed (e.g., see Smith et al., 1983, J. Virol. 46:584; Smith, U.S. Pat. No. 4,215,051).

[0054] In mammalian host cells, a number of viral-based expression systems may be utilized. In cases where an adenovirus is used as an expression vector, the NHP nucleotide sequence of interest may be ligated to an adenovirus transcription/translation control complex, e.g., the late promoter and tripartite leader sequence. This chimeric gene may then be inserted in the adenovirus genome by in vitro or in vivo recombination. Insertion in a non-essential region of the viral genome (e.g., region E1 or E3) will result in a recombinant virus that is viable and capable of expressing a NHP product in infected hosts (e.g., See Logan & Shenk, 1984, Proc. Natl. Acad. Sci. USA 81:3655-3659). Specific initiation signals may also be required for efficient translation of inserted NHP nucleotide sequences. These signals include the ATG initiation codon and adjacent sequences. In cases where an entire NHP gene or cDNA, including its own initiation codon and adjacent sequences, is inserted into the appropriate expression vector, no additional translational control signals may be needed. However, in cases where only a portion of a NHP coding sequence is inserted, exogenous translational control signals, including, perhaps, the ATG initiation codon, must be provided. Furthermore, the initiation codon must be in phase with the reading frame of the desired coding sequence to ensure translation of the entire insert. These exogenous translational control signals and initiation codons can be of a variety of origins, both natural and synthetic. The efficiency of expression may be enhanced by the inclusion of appropriate transcription enhancer elements, transcription terminators, etc. (See Bitter et al., 1987, Methods in Enzymol. 153:516-544).

[0055] In addition, a host cell strain may be chosen that modulates the expression of the inserted sequences, or modifies and processes the gene product in the specific fashion desired. Such modifications (e.g., glycosylation) and processing (e.g., cleavage) of protein products may be important for the function of the protein. Different host cells have characteristic and specific mechanisms for the post-translational processing and modification of proteins and gene products. Appropriate cell lines or host systems can be chosen to ensure the correct modification and processing of the foreign protein expressed. To this end, eukaryotic host cells which possess the cellular machinery for proper processing of the primary transcript, glycosylation, and phosphorylation of the gene product may be used. Such mammalian host cells include, but are not limited to, CHO, VERO, BHK, HeLa, COS, MDCK, 293, 3T3, WI38, and in particular, human cell lines.

[0056] For long-term, high-yield production of recombinant proteins, stable expression is preferred. For example, cell lines which stably express the NHP sequences described above can be engineered. Rather than using expression vectors which contain viral origins of replication, host cells can be transformed with DNA controlled by appropriate expression control elements (e.g., promoter, enhancer sequences, transcription terminators, polyadenylation sites, etc.), and a selectable marker. Following the introduction of the foreign DNA, engineered cells may be allowed to grow for 1-2 days in an enriched media, and then are switched to a selective media. The selectable marker in the recombinant plasmid confers resistance to the selection and allows cells to stably integrate the plasmid into their chromosomes and grow to form foci which in turn can be cloned and expanded into cell lines. This method may advantageously be used to engineer cell lines which express the NHP product. Such engineered cell lines may be particularly useful in screening and evaluation of compounds that affect the endogenous activity of the NHP product.

[0057] A number of selection systems may be used, including but not limited to the herpes simplex virus thymidine kinase (Wigler, et al., 1977, Cell 11:223), hypoxanthine-guanine phosphoribosyltransferase (Szybalska & Szybalski, 1962, Proc. Natl. Acad. Sci. USA 48:2026), and adenine phosphoribosyltransferase (Lowy, et al., 1980, Cell 22:817) genes can be employed in tk⁻, hgprt⁻ or aprt⁻ cells, respectively. Also, antimetabolite resistance can be used as the basis of selection for the following genes: dhfr, which confers resistance to methotrexate (Wigler, et al., 1980, Natl. Acad. Sci. USA 77:3567; O'Hare, et al., 1981, Proc. Natl. Acad. Sci. USA 78:1527); gpt, which confers resistance to mycophenolic acid (Mulligan & Berg, 1981, Proc. Natl. Acad. Sci. USA 78:2072); neo, which confers resistance to the aminoglycoside G-418 (Colberre-Garapin, et al., 1981, J. Mol. Biol. 150:1); and hygro, which confers resistance to hygromycin (Santerre, et al., 1984, Gene 30:147).

[0058] Alternatively, any fusion protein can be readily purified by utilizing an antibody specific for the fusion protein being expressed. For example, a system described by Janknecht et al. allows for the ready purification of non-denatured fusion proteins expressed in human cell lines (Janknecht, et al., 1991, Proc. Natl. Acad. Sci. USA 88:8972-8976). In this system, the polynucleotide of interest is subcloned into a vaccinia recombination plasmid such that the gene's open reading frame is translationally fused to an amino-terminal tag consisting of six histidine residues. Extracts from cells infected with recombinant vaccinia virus are loaded onto Ni²⁺-nitriloacetic acid-agarose columns and histidine-tagged proteins are selectively eluted with imidazole-containing buffers.

[0059] Additionally contemplated are oligopeptides that are modeled on an amino acid sequence first described in the Sequence Listing. Such NHP oligopeptides are generally between about 10 to about 100 amino acids long, or between about 16 to about 80, or between about 20 to about 35 amino acids long, or any variation or combination of sizes represented therein that incorporate a contiguous region of sequence first disclosed in the Sequence Listing. Such NHP oligopeptides can be of any length disclosed within the above ranges and can initiate at any amino acid position represented in the Sequence Listing.

[0060] Also encompassed by the present invention are fusion proteins that direct the NHP to a target organ and/or facilitate transport across the membrane into the cytosol. Conjugation of NHPs to antibody molecules or their Fab fragments could be used to target cells bearing a particular epitope. Attaching the appropriate signal sequence to the NHP would also transport the NHP to the desired location within the cell. Alternatively targeting of NHP or its nucleic acid sequence might be achieved using liposome or lipid complex based delivery systems. Such technologies are described in Liposomes:A Practical Approach, New,RRC ed., Oxford University Press, New York and in U.S. Pat. Nos. 4,594,595, 5,459,127, 5,948,767 and 6,110,490 and their respective disclosures which are herein incorporated by reference in their entirety. Additionally embodied are novel protein constructs engineered in such a way that they facilitate transport of the NHP to the target site or desired organ. This goal may be achieved by coupling of the NHP to a cytokine or other ligand that provides targeting specificity, and/or to a protein transducing domain (see generally U.S. applications Ser. No. 60/111,701 and 60/056,713, both of which are herein incorporated by reference, for examples of such transducing sequences) to facilitate passage across cellular membranes if needed and can optionally be engineered to include nuclear localization sequences when desired.

5.3 Antibodies to NHP Products

[0061] Antibodies that specifically recognize one or more epitopes of a NHP, or epitopes of conserved variants of a NHP, or peptide fragments of a NHP are also encompassed by the invention. Such antibodies include but are not limited to polyclonal antibodies, monoclonal antibodies (mAbs), humanized or chimeric antibodies, single chain antibodies, Fab fragments, F(ab′)₂ fragments, fragments produced by a Fab expression library, anti-idiotypic (anti-Id) antibodies, and epitope-binding fragments of any of the above.

[0062] The antibodies of the invention may be used, for example, in the detection of NHP in a biological sample and may, therefore, be utilized as part of a diagnostic or prognostic technique whereby patients may be tested for abnormal amounts of NHP. Such antibodies may also be utilized in conjunction with, for example, compound screening schemes for the evaluation of the effect of test compounds on expression and/or activity of a NHP gene product. Additionally, such antibodies can be used in conjunction gene therapy to, for example, evaluate the normal and/or engineered NHP-expressing cells prior to their introduction into the patient. Such antibodies may additionally be used as a method for the inhibition of abnormal NHP activity. Thus, such antibodies may, therefore, be utilized as part of treatment methods.

[0063] For the production of antibodies, various host animals may be immunized by injection with the NHP, an NHP peptide (e.g., one corresponding to a functional domain of an NHP), truncated NHP polypeptides (NHP in which one or more domains have been deleted), functional equivalents of the NHP or mutated variant of the NHP. Such host animals may include but are not limited to pigs, rabbits, mice, goats, and rats, to name but a few. Various adjuvants may be used to increase the immunological response, depending on the host species, including but not limited to Freund's adjuvant (complete and incomplete), mineral salts such as aluminum hydroxide or aluminum phosphate, surface active substances such as lysolecithin, pluronic polyols, polyanions, peptides, oil emulsions, and potentially useful human adjuvants such as BCG (bacille Calmette-Guerin) and Corynebacterium parvum. Alternatively, the immune response could be enhanced by combination and or coupling with molecules such as keyhole limpet hemocyanin, tetanus toxoid, diptheria toxoid, ovalbumin, cholera toxin or fragments thereof. Polyclonal antibodies are heterogeneous populations of antibody molecules derived from the sera of the immunized animals.

[0064] Monoclonal antibodies, which are homogeneous populations of antibodies to a particular antigen, can be obtained by any technique which provides for the production of antibody molecules by continuous cell lines in culture. These include, but are not limited to, the hybridoma technique of Kohler and Milstein, (1975, Nature 256:495-497; and U.S. Pat. No. 4,376,110), the human B-cell hybridoma technique (Kosbor et al., 1983, Immunology Today 4:72; Cole et al., 1983, Proc. Natl. Acad. Sci. USA 80:2026-2030), and the EBV-hybridoma technique (Cole et al., 1985, Monoclonal Antibodies And Cancer Therapy, Alan R. Liss, Inc., pp. 77-96). Such antibodies may be of any immunoglobulin class including IgG, IgM, IgE, IgA, IgD and any subclass thereof. The hybridoma producing the mAb of this invention may be cultivated in vitro or in vivo. Production of high titers of mAbs in vivo makes this the presently preferred method of production.

[0065] In addition, techniques developed for the production of “chimeric antibodies” (Morrison et al., 1984, Proc. Natl. Acad. Sci., 81:6851-6855; Neuberger et al., 1984, Nature, 312:604-608; Takeda et al., 1985, Nature, 314:452-454) by splicing the genes from a mouse antibody molecule of appropriate antigen specificity together with genes from a human antibody molecule of appropriate biological activity can be used. A chimeric antibody is a molecule in which different portions are derived from different animal species, such as those having a variable region derived from a murine mAb and a human immunoglobulin constant region. Such technologies are described in U.S. Pat. Nos. 6,075,181 and 5,877,397 and their respective disclosures which are herein incorporated by reference in their entirety. Also encompassed by the present invention is the use of fully humanized monoclonal antibodies as described in U.S. Pat. No. 6,150,584 and respective disclosures which are herein incorporated by reference in their entirety.

[0066] Alternatively, techniques described for the production of single chain antibodies (U.S. Pat. No. 4,946,778; Bird, 1988, Science 242:423-426; Huston et al., 1988, Proc. Natl. Acad. Sci. USA 85:5879-5883; and Ward et al., 1989, Nature 341:544-546) can be adapted to produce single chain antibodies against NHP gene products. Single chain antibodies are formed by linking the heavy and light chain fragments of the Fv region via an amino acid bridge, resulting in a single chain polypeptide.

[0067] Antibody fragments that recognize specific epitopes may be generated by known techniques. For example, such fragments include, but are not limited to: the F(ab′)₂ fragments which can be produced by pepsin digestion of the antibody molecule and the Fab fragments which can be generated by reducing the disulfide bridges of the F(ab′)₂ fragments. Alternatively, Fab expression libraries may be constructed (Huse et al., 1989, Science, 246:1275-1281) to allow rapid and easy identification of monoclonal Fab fragments with the desired specificity.

[0068] Antibodies to a NHP can, in turn, be utilized to generate anti-idiotype antibodies that “mimic” a given NHP, using techniques well known to those skilled in the art. (See, e.g., Greenspan & Bona, 1993, FASEB J 7(5):437-444; and Nissinoff, 1991, J. Immunol. 147(8):2429-2438). For example antibodies which bind to a NHP domain and competitively inhibit the binding of NHP to its cognate receptor can be used to generate anti-idiotypes that “mimic” the NHP and, therefore, bind and activate or neutralize a receptor. Such anti-idiotypic antibodies or Fab fragments of such anti-idiotypes can be used in therapeutic regimens involving a NHP mediated pathway.

[0069] The present invention is not to be limited in scope by the specific embodiments described herein, which are intended as single illustrations of individual aspects of the invention, and functionally equivalent methods and components are within the scope of the invention. Indeed, various modifications of the invention, in addition to those shown and described herein will become apparent to those skilled in the art from the foregoing description. Such modifications are intended to fall within the scope of the appended claims. All cited publications, patents, and patent applications are herein incorporated by reference in their entirety.

1 3 1 2772 DNA homo sapiens 1 atgccccgcc accacgcggg aggagaggag ggcggcgccg ccgggctctg ggtgaagagc 60 ggcgcagcgg cggcggcggc gggcgggggg cgcttgggca gcggcatgaa ggatgtggag 120 tcgggccggg gcagggtgct gctgaactcg gcagccgcca ggggcgacgg cctgctactg 180 ctgggcaccc gcgcggccac gctcggtggc ggcggcggtg gcctgaggga gagccgccgg 240 ggcaagcagg gggcccggat gagcctgctg gggaagccgc tctcttacac gagtagccag 300 agctgccggc gcaacgtcaa gtaccggcgg gtgcagaact acctgtacaa cgtgctggag 360 agaccccgcg gctgggcgtt catctaccac gctttcgttt ttctccttgt ctttggttgc 420 ttgattttgt cagtgttttc taccatccct gagcacacaa aattggcctc aagttgcctc 480 ttgatcctgg agttcgtgat gattgtcgtc tttggtttgg agttcatcat tcgaatctgg 540 tctgcgggtt gctgttgtcg atatagagga tggcaaggaa gactgaggtt tgctcgaaag 600 cccttctgtg ttatagatac cattgttctt atcgcttcaa tagcagttgt ttctgcaaaa 660 actcagggta atatttttgc cacgtctgca ctcagaagtc tccgtttcct acagatcctc 720 cgcatggtgc gcatggaccg aaggggaggc acttggaaat tactgggttc agtggtttat 780 gctcacagca aggaattaat cacagcttgg tacataggat ttttggttct tattttttcg 840 tctttccttg tctatctggt ggaaaaggat gccaataaag agttttctac atatgcagat 900 gctctctggt ggggcacaat tacattgaca actattggct atggagacaa aactccccta 960 acttggctgg gaagattgct ttctgcaggc tttgcactcc ttggcatttc tttctttgca 1020 cttcctgccg gcattcttgg ctcaggtttt gcattaaaag tacaagaaca acaccgccag 1080 aaacactttg agaaaagaag gaacccagct gccaacctca ttcagtgtgt ttggcgtagt 1140 tacgcagctg atgagaaatc tgtttccatt gcaacctgga agccacactt gaaggccttg 1200 cacacctgca gccctaccaa tcagaagcta agttttaagg agcgagtgcg catggctagc 1260 cccaggggcc agagtattaa gagccgacaa gcctcagtag gtgacaggag gtccccaagc 1320 accgacatca cagccgaggg cagtcccacc aaagtgcaga agagctggag cttcaacgac 1380 cgaacccgct tccggccctc gctgcgcctc aaaagttctc agccaaaacc agtgatagat 1440 gctgacacag cccttggcac tgatgatgta tatgatgaaa aaggatgcca gtgtgatgta 1500 tcagtggaag acctcacccc accacttaaa actgtcattc gagctatcag aattatgaaa 1560 tttcatgttg caaaacggaa gtttaaggaa acattacgtc catatgatgt aaaagatgtc 1620 attgaacaat attctgctgg tcatctggac atgttgtgta gaattaaaag ccttcaaaca 1680 cgtgttgatc aaattcttgg aaaagggcaa atcacatcag ataagaagag ccgagagaaa 1740 ataacagcag aacatgagac cacagacgat ctcagtatgc tcggtcgggt ggtcaaggtt 1800 gaaaaacagg tacagtccat agaatccaag ctggactgcc tactagacat ctatcaacag 1860 gtccttcgga aaggctctgc ctcagccctc gctttggctt cattccagat cccacctttt 1920 gaatgtgaac agacatctga ctatcaaagc cctgtggata gcaaagatct ttcgggttcc 1980 gcacaaaaca gtggctgctt atccagatca actagtgcca acatctcgag aggcctgcag 2040 ttcattctga cgccaaatga gttcagtgcc cagactttct acgcgcttag ccctactatg 2100 cacagtcaag caacacaggt gccaattagt caaagcgatg gctcagcagt ggcagccacc 2160 aacaccattg caaaccaaat aaatacggca cccaagccag cagccccaac aactttacag 2220 atcccacctc ctctcccagc catcaagcat ctgcccaggc cagaaactct gcaccctaac 2280 cctgcaggct tacaggaaag catttctgac gtcaccacct gccttgttgc ctccaaggaa 2340 aatgttcagg ttgcacagtc aaatctcacc aaggaccgtt ctatgaggaa aagctttgac 2400 atgggaggag aaactctgtt gtctgtctgt cccatggtgc cgaaggactt gggcaaatct 2460 ttgtctgtgc aaaacctgat caggtcgacc gaggaactga atatacaact ttcagggagt 2520 gagtcaagtg gctccagagg cagccaagat ttttacccca aatggaggga atccaaattg 2580 tttataactg atgaagaggt gggtcccgaa gagacagaga cagacacttt tgatgccgca 2640 ccgcagcctg ccagggaagc tgcctttgca tcagactctc taaggactgg aaggtcacga 2700 tcatctcaga gcatttgtaa ggcaggagaa agtacagatg ccctcagctt gcctcatgtc 2760 aaactgaaat aa 2772 2 923 PRT homo sapiens 2 Met Pro Arg His His Ala Gly Gly Glu Glu Gly Gly Ala Ala Gly Leu 1 5 10 15 Trp Val Lys Ser Gly Ala Ala Ala Ala Ala Ala Gly Gly Gly Arg Leu 20 25 30 Gly Ser Gly Met Lys Asp Val Glu Ser Gly Arg Gly Arg Val Leu Leu 35 40 45 Asn Ser Ala Ala Ala Arg Gly Asp Gly Leu Leu Leu Leu Gly Thr Arg 50 55 60 Ala Ala Thr Leu Gly Gly Gly Gly Gly Gly Leu Arg Glu Ser Arg Arg 65 70 75 80 Gly Lys Gln Gly Ala Arg Met Ser Leu Leu Gly Lys Pro Leu Ser Tyr 85 90 95 Thr Ser Ser Gln Ser Cys Arg Arg Asn Val Lys Tyr Arg Arg Val Gln 100 105 110 Asn Tyr Leu Tyr Asn Val Leu Glu Arg Pro Arg Gly Trp Ala Phe Ile 115 120 125 Tyr His Ala Phe Val Phe Leu Leu Val Phe Gly Cys Leu Ile Leu Ser 130 135 140 Val Phe Ser Thr Ile Pro Glu His Thr Lys Leu Ala Ser Ser Cys Leu 145 150 155 160 Leu Ile Leu Glu Phe Val Met Ile Val Val Phe Gly Leu Glu Phe Ile 165 170 175 Ile Arg Ile Trp Ser Ala Gly Cys Cys Cys Arg Tyr Arg Gly Trp Gln 180 185 190 Gly Arg Leu Arg Phe Ala Arg Lys Pro Phe Cys Val Ile Asp Thr Ile 195 200 205 Val Leu Ile Ala Ser Ile Ala Val Val Ser Ala Lys Thr Gln Gly Asn 210 215 220 Ile Phe Ala Thr Ser Ala Leu Arg Ser Leu Arg Phe Leu Gln Ile Leu 225 230 235 240 Arg Met Val Arg Met Asp Arg Arg Gly Gly Thr Trp Lys Leu Leu Gly 245 250 255 Ser Val Val Tyr Ala His Ser Lys Glu Leu Ile Thr Ala Trp Tyr Ile 260 265 270 Gly Phe Leu Val Leu Ile Phe Ser Ser Phe Leu Val Tyr Leu Val Glu 275 280 285 Lys Asp Ala Asn Lys Glu Phe Ser Thr Tyr Ala Asp Ala Leu Trp Trp 290 295 300 Gly Thr Ile Thr Leu Thr Thr Ile Gly Tyr Gly Asp Lys Thr Pro Leu 305 310 315 320 Thr Trp Leu Gly Arg Leu Leu Ser Ala Gly Phe Ala Leu Leu Gly Ile 325 330 335 Ser Phe Phe Ala Leu Pro Ala Gly Ile Leu Gly Ser Gly Phe Ala Leu 340 345 350 Lys Val Gln Glu Gln His Arg Gln Lys His Phe Glu Lys Arg Arg Asn 355 360 365 Pro Ala Ala Asn Leu Ile Gln Cys Val Trp Arg Ser Tyr Ala Ala Asp 370 375 380 Glu Lys Ser Val Ser Ile Ala Thr Trp Lys Pro His Leu Lys Ala Leu 385 390 395 400 His Thr Cys Ser Pro Thr Asn Gln Lys Leu Ser Phe Lys Glu Arg Val 405 410 415 Arg Met Ala Ser Pro Arg Gly Gln Ser Ile Lys Ser Arg Gln Ala Ser 420 425 430 Val Gly Asp Arg Arg Ser Pro Ser Thr Asp Ile Thr Ala Glu Gly Ser 435 440 445 Pro Thr Lys Val Gln Lys Ser Trp Ser Phe Asn Asp Arg Thr Arg Phe 450 455 460 Arg Pro Ser Leu Arg Leu Lys Ser Ser Gln Pro Lys Pro Val Ile Asp 465 470 475 480 Ala Asp Thr Ala Leu Gly Thr Asp Asp Val Tyr Asp Glu Lys Gly Cys 485 490 495 Gln Cys Asp Val Ser Val Glu Asp Leu Thr Pro Pro Leu Lys Thr Val 500 505 510 Ile Arg Ala Ile Arg Ile Met Lys Phe His Val Ala Lys Arg Lys Phe 515 520 525 Lys Glu Thr Leu Arg Pro Tyr Asp Val Lys Asp Val Ile Glu Gln Tyr 530 535 540 Ser Ala Gly His Leu Asp Met Leu Cys Arg Ile Lys Ser Leu Gln Thr 545 550 555 560 Arg Val Asp Gln Ile Leu Gly Lys Gly Gln Ile Thr Ser Asp Lys Lys 565 570 575 Ser Arg Glu Lys Ile Thr Ala Glu His Glu Thr Thr Asp Asp Leu Ser 580 585 590 Met Leu Gly Arg Val Val Lys Val Glu Lys Gln Val Gln Ser Ile Glu 595 600 605 Ser Lys Leu Asp Cys Leu Leu Asp Ile Tyr Gln Gln Val Leu Arg Lys 610 615 620 Gly Ser Ala Ser Ala Leu Ala Leu Ala Ser Phe Gln Ile Pro Pro Phe 625 630 635 640 Glu Cys Glu Gln Thr Ser Asp Tyr Gln Ser Pro Val Asp Ser Lys Asp 645 650 655 Leu Ser Gly Ser Ala Gln Asn Ser Gly Cys Leu Ser Arg Ser Thr Ser 660 665 670 Ala Asn Ile Ser Arg Gly Leu Gln Phe Ile Leu Thr Pro Asn Glu Phe 675 680 685 Ser Ala Gln Thr Phe Tyr Ala Leu Ser Pro Thr Met His Ser Gln Ala 690 695 700 Thr Gln Val Pro Ile Ser Gln Ser Asp Gly Ser Ala Val Ala Ala Thr 705 710 715 720 Asn Thr Ile Ala Asn Gln Ile Asn Thr Ala Pro Lys Pro Ala Ala Pro 725 730 735 Thr Thr Leu Gln Ile Pro Pro Pro Leu Pro Ala Ile Lys His Leu Pro 740 745 750 Arg Pro Glu Thr Leu His Pro Asn Pro Ala Gly Leu Gln Glu Ser Ile 755 760 765 Ser Asp Val Thr Thr Cys Leu Val Ala Ser Lys Glu Asn Val Gln Val 770 775 780 Ala Gln Ser Asn Leu Thr Lys Asp Arg Ser Met Arg Lys Ser Phe Asp 785 790 795 800 Met Gly Gly Glu Thr Leu Leu Ser Val Cys Pro Met Val Pro Lys Asp 805 810 815 Leu Gly Lys Ser Leu Ser Val Gln Asn Leu Ile Arg Ser Thr Glu Glu 820 825 830 Leu Asn Ile Gln Leu Ser Gly Ser Glu Ser Ser Gly Ser Arg Gly Ser 835 840 845 Gln Asp Phe Tyr Pro Lys Trp Arg Glu Ser Lys Leu Phe Ile Thr Asp 850 855 860 Glu Glu Val Gly Pro Glu Glu Thr Glu Thr Asp Thr Phe Asp Ala Ala 865 870 875 880 Pro Gln Pro Ala Arg Glu Ala Ala Phe Ala Ser Asp Ser Leu Arg Thr 885 890 895 Gly Arg Ser Arg Ser Ser Gln Ser Ile Cys Lys Ala Gly Glu Ser Thr 900 905 910 Asp Ala Leu Ser Leu Pro His Val Lys Leu Lys 915 920 3 3111 DNA homo sapiens 3 actcactata gggctcgagc ggccgcccgg gcaggtctcg cggtgcccgt ggtgatgcca 60 tgccccgcca ccacgcggga ggagaggagg gcggcgccgc cgggctctgg gtgaagagcg 120 gcgcagcggc ggcggcggcg ggcggggggc gcttgggcag cggcatgaag gatgtggagt 180 cgggccgggg cagggtgctg ctgaactcgg cagccgccag gggcgacggc ctgctactgc 240 tgggcacccg cgcggccacg ctcggtggcg gcggcggtgg cctgagggag agccgccggg 300 gcaagcaggg ggcccggatg agcctgctgg ggaagccgct ctcttacacg agtagccaga 360 gctgccggcg caacgtcaag taccggcggg tgcagaacta cctgtacaac gtgctggaga 420 gaccccgcgg ctgggcgttc atctaccacg ctttcgtttt tctccttgtc tttggttgct 480 tgattttgtc agtgttttct accatccctg agcacacaaa attggcctca agttgcctct 540 tgatcctgga gttcgtgatg attgtcgtct ttggtttgga gttcatcatt cgaatctggt 600 ctgcgggttg ctgttgtcga tatagaggat ggcaaggaag actgaggttt gctcgaaagc 660 ccttctgtgt tatagatacc attgttctta tcgcttcaat agcagttgtt tctgcaaaaa 720 ctcagggtaa tatttttgcc acgtctgcac tcagaagtct ccgtttccta cagatcctcc 780 gcatggtgcg catggaccga aggggaggca cttggaaatt actgggttca gtggtttatg 840 ctcacagcaa ggaattaatc acagcttggt acataggatt tttggttctt attttttcgt 900 ctttccttgt ctatctggtg gaaaaggatg ccaataaaga gttttctaca tatgcagatg 960 ctctctggtg gggcacaatt acattgacaa ctattggcta tggagacaaa actcccctaa 1020 cttggctggg aagattgctt tctgcaggct ttgcactcct tggcatttct ttctttgcac 1080 ttcctgccgg cattcttggc tcaggttttg cattaaaagt acaagaacaa caccgccaga 1140 aacactttga gaaaagaagg aacccagctg ccaacctcat tcagtgtgtt tggcgtagtt 1200 acgcagctga tgagaaatct gtttccattg caacctggaa gccacacttg aaggccttgc 1260 acacctgcag ccctaccaat cagaagctaa gttttaagga gcgagtgcgc atggctagcc 1320 ccaggggcca gagtattaag agccgacaag cctcagtagg tgacaggagg tccccaagca 1380 ccgacatcac agccgagggc agtcccacca aagtgcagaa gagctggagc ttcaacgacc 1440 gaacccgctt ccggccctcg ctgcgcctca aaagttctca gccaaaacca gtgatagatg 1500 ctgacacagc ccttggcact gatgatgtat atgatgaaaa aggatgccag tgtgatgtat 1560 cagtggaaga cctcacccca ccacttaaaa ctgtcattcg agctatcaga attatgaaat 1620 ttcatgttgc aaaacggaag tttaaggaaa cattacgtcc atatgatgta aaagatgtca 1680 ttgaacaata ttctgctggt catctggaca tgttgtgtag aattaaaagc cttcaaacac 1740 gtgttgatca aattcttgga aaagggcaaa tcacatcaga taagaagagc cgagagaaaa 1800 taacagcaga acatgagacc acagacgatc tcagtatgct cggtcgggtg gtcaaggttg 1860 aaaaacaggt acagtccata gaatccaagc tggactgcct actagacatc tatcaacagg 1920 tccttcggaa aggctctgcc tcagccctcg ctttggcttc attccagatc ccaccttttg 1980 aatgtgaaca gacatctgac tatcaaagcc ctgtggatag caaagatctt tcgggttccg 2040 cacaaaacag tggctgctta tccagatcaa ctagtgccaa catctcgaga ggcctgcagt 2100 tcattctgac gccaaatgag ttcagtgccc agactttcta cgcgcttagc cctactatgc 2160 acagtcaagc aacacaggtg ccaattagtc aaagcgatgg ctcagcagtg gcagccacca 2220 acaccattgc aaaccaaata aatacggcac ccaagccagc agccccaaca actttacaga 2280 tcccacctcc tctcccagcc atcaagcatc tgcccaggcc agaaactctg caccctaacc 2340 ctgcaggctt acaggaaagc atttctgacg tcaccacctg ccttgttgcc tccaaggaaa 2400 atgttcaggt tgcacagtca aatctcacca aggaccgttc tatgaggaaa agctttgaca 2460 tgggaggaga aactctgttg tctgtctgtc ccatggtgcc gaaggacttg ggcaaatctt 2520 tgtctgtgca aaacctgatc aggtcgaccg aggaactgaa tatacaactt tcagggagtg 2580 agtcaagtgg ctccagaggc agccaagatt tttaccccaa atggagggaa tccaaattgt 2640 ttataactga tgaagaggtg ggtcccgaag agacagagac agacactttt gatgccgcac 2700 cgcagcctgc cagggaagct gcctttgcat cagactctct aaggactgga aggtcacgat 2760 catctcagag catttgtaag gcaggagaaa gtacagatgc cctcagcttg cctcatgtca 2820 aactgaaata agttcttcat tttctttcca ggcatagcag ttctttagcc atacatatca 2880 ttgcatgaac tatttcgaaa gcccttctaa aaagttgaaa ttgcaagaat cgggaagaac 2940 atgaaaggca gtttataagc ccgttacctt ttaattgcat gaaaatgcat gtttagggat 3000 ggctaaaatt ccaaggtgca tcgacattaa cccactcatt agtaatgtac cttgagttaa 3060 aaagcctgag aaaccaaaca cagcttaatg ctatgggggg tatgaatatg t 3111 

What is claimed is:
 1. An isolated nucleic acid molecule comprising at least 24 contiguous bases of nucleotide sequence first disclosed in SEQ ID NO:
 1. 2. An isolated nucleic acid molecule comprising a nucleotide sequence that: (a) encodes the amino acid sequence shown in SEQ ID NO: 2; and (b) hybridizes under stringent conditions to the nucleotide sequence of SEQ ID NO: 1 or the complement thereof.
 3. An isolated nucleic acid molecule comprising a nucleotide sequence that encodes the amino acid sequence shown in SEQ ID NO:
 2. 4. An isolated oligopeptide having a sequence of at least about 12 contiguous amino acids first disclosed in. SEQ ID NO:2. 